With Victron I pay 1400€ for the charger/inverter, about 1800€ for 15kWh worth of batteries, perhaps another 300€ for BMS and solar charge controller. That puts me well below the cost od an SBV4600 + B4600 combo, with almost twice the battery capacity and a generally much more capable system. Of course there would be cost for the integration of all of that, but that should be relatively low for an integrated, mass-produced unit like the SBV compared to wiring up panels. And economy of scale should offset the component cost quite a bit.
